This guide compares common pre-purchase checklist items against what they miss and shows where HVAC checks fit, especially for older homes, renovated stock, and rentals marketed as “air-conditioned”. What do most pre-purchase checklists actually prioritise? Most checklists prioritise structural risk, legal risk, and obvious safety issues because they can derail finance, insurance, or settlement. That usually means building and pest reports, compliance checks, and contract conditions. What often gets pushed down is the “operational condition” of inclusions: appliances, hot water, and HVAC. That is where a quick, targeted air conditioning service Hornsby check can prevent a post-settlement scramble. Why do investors undervalue air conditioning checks before exchange? Investors undervalue HVAC…